hello there,
aside for American Express credit cards, i can show you more credit cards coming from other card issuers such as Capital One, MBNA, CitiBank and more.
these cards offer exclusive benefits that is not offer to other credit cards. usually these kind of cards require good or excellent credit history which mean that these are only limited to those who have maintained a good rating.
not all of the card applicant can get these card as application for this card undergone strict scrutinizing by the card issuer as this cards give excellent offers. one of the top benefit of these cards is the high credit limit reaching around $100,000 and could be stretched further. there are a lot more features.
here is the link of the Best Platinum Credit Cards in Canada:
/archives/2010/4/platinum+credit+card+canada.html
browse on each card to identify the exclusive offers that these cards provide their clients and compare them. in that way, you can then decide which card is suitable for you.
if ever you come to a point that you get confused on some things whether on the credit card offers, benefits or features. you can post it in this thread and i can assist or help you. thank you.